It is rather surprising he could get his "weenie fingers" to lie straight enough across the fretboard to play slide. Must have taken many takes At least he didn't use the violin bow.
if you got the muse, no physical deformity can keep you from expressing it. case in point Tony Iommi for those who dont know the story and agreed, his playing on IMTOD never fails to fascinate me to the exclusion of whatever Im doing at that moment, I just have to stop adn marvle in it.